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partial derivative means u treat other variable as constant. u know this ?
Right, so we treat y as a constant in the first one..
Which variable are you taking constant>?
absolutely! that was my next statement, that u need log diff. here.
In my experiences with log diff I always had a function in the form of y = f(x)^g(x).... So what do we do here?
do we write y = ......?
taking log on both sides, u get log y = g(x) log f(x) then use product rule
u'll also need a chain rule for this....
oh dear! the y on left and on right are different, u should have used g or some other letter
oohhhhhh.. that's where I went wrong... this is off my last quiz :/
so it'll be g'/g on the left?
yes, after doing product rule , u resubstitute for g
same for 2nd question, just replace x with y and y with x
right... I just messed up on calling the function y... messed with my head.
thanks again for the insight!
I'm not going to do the second derivative, I think I can get it... Thanks so much!
I mean, i'm not going to do it on here.. :)
ok, welcome ^_^